Rene Descartes  
John Locke  
George Berkeley  
Johannes Muller  
Paul Broca  
Gustav Fritsch  
Eduard Hitzig  
G. Stanley Hall  
William James  
Hermann von Helmholtz  
Ernst Weber  
Wilhelm Wundt  
Hermann Ebbinghaus  
Charles Darwin  
Sigmund Freud  
James B. Watson  
Edward Thorndike  
Ivan P. Pavlov  
B.F. Skinner  
Max Wertheimer  
Abraham Maslow  
Inez Prosser  
Carl Rogers  
Karen Horney  
Alfred Binet  
Theodore Simon  
Francis Sumner  
Margaret Floy Washburn